metron-deployment/roles/elasticsearch/tasks/elasticsearch.yml

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---
- name: Add Elasticsearch GPG key
  rpm_key:
    key: https://packages.elastic.co/GPG-KEY-elasticsearch
    state: present

- name: Add Elasticsearch repository
  copy:
    src: elasticsearch.repo
    dest: /etc/yum.repos.d/elasticsearch.repo
    mode: 0644

- name: Install Elasticsearch
  yum:
    name: elasticsearch
    state: installed
  register: result
  until: result.rc == 0
  retries: 5
  delay: 10

- name: Create Data Directories
  file:
    path: "{{ item }}"
    state: directory
    mode: 0755
    owner: elasticsearch
    group: elasticsearch
  when: elasticsearch_data_dir is defined
  with_items:
     - '{{ elasticsearch_data_dir.split(",") }}'

- name: Configure Elasticsearch - remove stale entries
  lineinfile: >
    dest=/etc/elasticsearch/elasticsearch.yml
    regexp="{{ item }}"
    state=absent
  with_items:
    - '^cluster\.name:'
    - '^network\.host:'
    - '^discovery\.zen\.ping\.unicast\.hosts:'
    - '^path\.data'

- name: Configure Elasticsearch
  lineinfile: >
    dest=/etc/elasticsearch/elasticsearch.yml
    regexp="{{ item.regexp }}"
    insertafter="{{ item.regexp }}"
    line="{{ item.line }}"
    state=present
  with_items:
    - { regexp: '^# *cluster\.name:', line: 'cluster.name: metron' }
    - { regexp: '^# *network\.host:', line: 'network.host: _{{
    elasticsearch_network_interface  }}:ipv4_' }
    - { regexp: '^# *discovery\.zen\.ping\.unicast\.hosts:',
    line: 'discovery.zen.ping.unicast.hosts: [ {{ es_hosts }} ]'}
    - { regexp: '^# *path\.data', line: 'path.data: {{     elasticsearch_data_dir }}' }